# US 2018/0324667 A1 · Method and device for enhancing service in communication system supporting public safety network service > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0324667 A1 - Document ID: US20180324667A1 - Status: Published application - Kind: A1 - Application number: 15/773,023 - Filed: 2016-11-04 - Published: 2018-11-08 - Earliest claimed: 2015-11-06 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Jeongsik DONG; Junhyuk SONG; Daejoong KIM - Web page: https://patentgrep.com/patent/US20180324667A1 ## CPC - H04W 88/02: Terminal devices - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04W 4/10: Push-to-Talk [PTT] or Push-On-Call services - H04W 4/90: Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] - H04W 36/302: {due to low signal strength} - H04W 48/10: using broadcasted information - H04W 48/20: Selecting an access point - H04W 88/08: Access point devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An embodiment of the present invention relates to a method for transmitting, by a base station, information in a wireless communication system, and a base station performing the same, the method comprising the steps of: generating a system information block comprising first hysteresis information about a first type terminal, and second hysteresis information about a second type terminal; and broadcasting the generated system information block, wherein the first type terminal includes a terminal which does not provide a public safety network service, and wherein the second type terminal includes a terminal which provides a public safety network service. In addition, the present invention relates to a terminal which operates with the base station, and a method for operating the terminal. ## Claims ### Claim 1 A method of information transmission for a base station in a wireless communication system, the method comprising: generating a system information block including first hysteresis information for a first type terminal and second hysteresis information for a second type terminal; and broadcasting the generated system information block, wherein the first type terminal includes a terminal not supporting the public safety network service, and the second type terminal includes a terminal supporting the public safety network service. ### Claim 2 (depends on 1) The method of claim 1, wherein the first hysteresis information is used by the first type terminal for cell reselection, and the second hysteresis information is used by the second type terminal for cell reselection. ### Claim 3 (depends on 1) The method of claim 1, wherein the system information block includes first threshold information for the first type terminal and second threshold information for the second type terminal, and wherein each threshold information is a criterion for the received signal strength used in cell reselection. ### Claim 4 A base station in a wireless communication system, comprising: a transceiver unit configured to transmit and receive a signal; and a controller configured to control generating a system information block including first hysteresis information for a first type terminal and second hysteresis information for a second type terminal, and broadcasting the generated system information block, wherein the first type terminal includes a terminal not supporting the public safety network service, and the second type terminal includes a terminal supporting the public safety network service. ### Claim 5 (depends on 4) The base station of claim 4, wherein the system information block (SIB) includes SIB3. ### Claim 6 (depends on 4) The base station of claim 4, wherein the first hysteresis information is used by the first type terminal for cell reselection, and the second hysteresis information is used by the second type terminal for cell reselection. ### Claim 7 (depends on 4) The base station of claim 4, wherein the system information block includes first threshold information for the first type terminal and second threshold information for the second type terminal, and wherein each threshold information is a criterion for the received signal strength used in cell reselection. ### Claim 8 A method of performing cell reselection for a terminal in a wireless communication system, the method comprising: receiving a system information block including at least one of hysteresis information and cell reselection threshold information from a base station; determining at least one piece of information to be applied according to the type of the terminal among the hysteresis information and the cell reselection threshold information; and performing cell reselection based on the system information block and the determination result, wherein the terminal type includes a first type for a terminal not supporting the public safety network service and a second type for a terminal supporting the public safety network service. ### Claim 9 (depends on 8) The method of claim 8, wherein the hysteresis information comprises first hysteresis information for the first type and second hysteresis information for the second type, and wherein cell reselection is performed based on either the first hysteresis information or the second hysteresis information according to the type of the terminal. ### Claim 10 (depends on 8) The method of claim 8, wherein the cell reselection threshold information comprises first threshold information for the first type and second threshold information for the second type, and wherein cell reselection is performed based on either the first threshold information or the second threshold information according to the type of the terminal. ### Claim 11 A terminal in a wireless communication system, comprising: a transceiver unit configured to transmit and receive a signal; and a controller configured to control receiving a system information block including at least one of hysteresis information and cell reselection threshold information from a base station, determining at least one piece of information to be applied according to the type of the terminal among the hysteresis information and the cell reselection threshold information, and performing cell reselection based on the system information block and the determination result, wherein the terminal type includes a first type for a terminal not supporting the public safety network service and a second type for a terminal supporting the public safety network service. ### Claim 12 (depends on 11) The terminal of claim 11, wherein the hysteresis information comprises first hysteresis information for the first type and second hysteresis information for the second type, and wherein the controller is configured to control cell reselection based on either the first hysteresis information or the second hysteresis information according to the type of the terminal. ### Claim 13 (depends on 11) The terminal of claim 11, wherein the cell reselection threshold information comprises first threshold information for the first type and second threshold information for the second type, and wherein the controller is configured to control cell reselection based on either the first threshold information or the second threshold information according to the type of the terminal. ### Claim 14 (depends on 11) The terminal of claim 11, wherein the system information block (SIB) includes SIB3. ### Claim 15 (depends on 11) The terminal of claim 11, wherein, if the terminal is a second type terminal, the controller is configured to control identifying offset information for delaying cell reselection, and performing cell reselection based on the hysteresis information included in the system information block and the offset information.